[es] We can introduce di erent techniques in order to reduce the fuel consumption, as well as,
pollutant emissions. These aspects have become one of the main requirements of modern
gas turbine aero engines. Two of the ...[+]

[es] We can introduce di erent techniques in order to reduce the fuel consumption, as well as,
pollutant emissions. These aspects have become one of the main requirements of modern
gas turbine aero engines. Two of the techniques that are developing are intercooling and
regeneration in a gas turbine engine.
These techniques, that change considerably the engine working cycle features, are well
known nowadays. We use in power plants or in automotive engines, with great results.
However, in aeronautical eld, the extra weight and drag, due to heat exchangers must be
carefully considered. Turboprop seems to be the most suitable gas turbine engine to be
equipped with heat exchangers and intercooler, thanks to the relatively small mass
ow rate
and the small propulsion power fraction, due to the exhaust nozzle.
A thermodynamic code that simulates the behaviour of a gas turbine engine at di erent
engine and operating conditions has been developed, using Matlab programming. In this
paper are presented the main results obtained by the code, simulating the behaviour at
cruise and take o conditions of a turboprop engine in gas turbine cycle and in one with
regeneration and intercooling.
Finally we have estimated the weight of the aeronautical heat exchanger, on the basis of,
a conventional speci c power of a modern turboprop engine, mass
ow rate, e ciency and
actual conventional heat exchangers weights.[-]